Improvement in making molds for casting



N4 PETERS. PHDTO LTHOGRA WASPHNGTON D C Unrrnn STATES PATENT OFFICE.

ROBERT JOBSON, OF VORDSLEY, COUNTY OF STAFFORD, ENGLAND.

IMPROVEMENT IN MAKING MOLDS FOR CASTING.

Spceilieation forming part of Letters Patent No. 23,375, dated March 2D, 1859.

Q0 all 'zu/mm, it' nmy con/cern,.-

Be it known that I, Bonner Jonson, of "Wordsley, in the county of Stafford, England, iron-founder, a subject of the Queen of Great Britain, have invented or discovered new and useful Improvements in Apparatus for Making Molds for Casting Metals; and I, the said ROBERT Jonson, do hereby declare the nature et' the said invention and in what manner the same is to be performed, to be particularly described and ascertained in and by the following` statement thereof-that is to say:

This invention has for its object a peculiar combination oi" apparatus to facilitate the making of molds for casting metals, with a view to render it unnecessary that the workman should turn over the flasks or boxes by hand. F or these purposes the apparatus is so arranged that the flask or box in which a mold is lo be made is fixed to a horizontal table, platform, or bed-plate, which is mounted so as to turn on horizontalv necks or axes. The box or lask having been tixed to the horizontal table, plate, or jrgilati'orm, the ramming is to be performed in the ordinary manner, and then in place of the workman lifting and turning the ilask or box over by hand, which is a very laborious task when the i'lask or box and pattern are large 'and heavy, the table, plate, or horizontal platform is caused, by a suitable cranlehandle or otherwise, to be turned over, together with the iiask, so that the upper surface of the horizontal table, plate, or platform comes undermost. A second plate or platform is then raised so as to come under the 'flask or box and mold therein. This second platform is then lowered with the lask or box and mold, the pattern either remaining in the mold or else being secured to the rotating platform is retained thereto to have another mold formed thereon.

Having thus stated the nature of my said invention, l will proceed more fully to describe the manner of performing the same.

In the drawings, Figure l shows a front ele vation of the machinery combined according to my invention. Fig. 2 shows a side elevation, and Fig. 3 a horizontal section.

In each of these gures the same letters of reference are used to indicate the same parts.

a a is the framing of the machine, the nature of which is clearly shown in the drawings. b is the platform, table, or plate moving` on necks or axes b' b, which turn in suitable bearings, as shown. The axes or necks on which the table or platform turns are shown to be fixed thereto; but it is evident that the axes b may be separate and not rotate, but allow the table or platform to rotate thereon. It is preferred that this bed or table b should consist of a rectangular open frame, b, with an inner liange all round, to which an upper plate is iixed, and which may be changed accord ing to the work intended for the time being to be performed thereon; but the plate or upper surface ofthe bed or table b may form part with the frame, which is carried by the axes or necks b. On the plate thus fixed to or forming part of the bed or table the pattern of the intended casting is placed, and when desired fixed thereon. The flask or box (in which a mold is to be made) is also placed thereon and retained by suitable lat-ches or holding` apparatus. The sand is then rammed in the daskor box in the ordinary manner, and when complete the tlask is to be turned over by a halfrevolution ofthe bed, table, or platform b, and it is the mounting of the bed, table, or platform b, whether formed with a iixed or movable upper plate or not, on or so as to turn with or on necks or axes which constitutes the peculiarity ofv my invention. And I would state that I am aware that it has heretofore been the practice to have trunnions, necks, or axes on the mold boxes or iiasks used, and to turn the same over thereon after the mold has been completed therein, and I mention this fact in order to state that l do not make any claim to the so mounting of fiasks or` boxes on necks or axes, as the same is an inconvenient arrangement. I would, however, here state that my invention is directed to the remedying ot such inconvenience, and which is most effectually accomplished by placing the bed or plate or table b (on which the liask or box is placed) on axes or necks, so that when the mold has been made in the ilask or box the same may, with the table, plate,or platform b, be turned over. The iiask or box with the mold therein may then be readily detached from the bed b and be received onto a second table or plate below, or be otherwise removed, the Y platform Z). The bed, platform, or table b may W bethen caused to resume its original position, another box or ilask may be placed thereon, and another nrold proceeded with.

The arrangement for retaining the revolving bed or plate or table b in position, and for turning it over, may be varied; but I prefer to use themachinery shown in the drawings.

c c are two projecting stops-one at each end ofthe bed b. These projections prevent the bed or table b going beyond the horizontal position when making the mold thereon, and also \when the bed or table b is turned over to have the mold and fiask detached. The axes or necks b where they turn in their 'bearings are of comparative large diameter, as shown, and in order to apply counterbalanceweights b* b4 there are projections b2 at the ends of the axes b, which receive arms b, with the counter-balances b4, as shown.

In order to receive the mold box or flask.

and mold therein when they are turned over with the bed, table, or platform b, I prefer to use a rising platform or plate, d, which is guided by the end framing, as shown.

e e are cords or chains having balanceweights f f fixed thereto, according to the weight of the boxes or flasks and molds to be received onto the platform or plate d. rlhe platform or plate d is raised by means of a lever, g, on the axes 7L, which, by means of the arms z' i and links j j, raise the plate or plat form d under the top of the flask or box when it has been turned over. The latches or holding apparatus by which the iiask or box is held to the bed or table b are then released. The platform or plate d is then lowered with the ilaskthereon, the bed b is turned over, and

is then again in position to receive another flask or box. The bed or table b is turned over I would remark that I make no claim to the I use of a rising plate `or platform, d, and the same may be dispensed with by having the machine arranged in such manner that the bed or tableb, in addition to being capable of turning on axes or necks, may, when it is turned over, descend toward the ground in order to deposit the flask or box onto the loor or onto a truck placed below to receive it.

Having thus described the nature of my invention, and the manner of performing the same, I would have it understood that I make no claim to the mechanical parts separately', but

lVhat I do claim is- Constructing the table, platform, or bed b so that it may turn on or about necks `or axes, substantially as herein described.

ROBERT Jonson.

XVitnesses:

GEO. PITT. HENRY WILLIAM CARPMAEL. 

